af37bca8 |
1 | // memory map related stuff |
2 | |
3 | typedef unsigned char u8; |
4 | typedef unsigned short u16; |
5 | typedef unsigned int u32; |
6 | |
7 | #define M68K_MEM_SHIFT 16 |
8 | |
9 | extern unsigned long m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT]; |
10 | extern unsigned long m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT]; |
11 | extern unsigned long m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT]; |
12 | extern unsigned long m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT]; |
13 | |
14 | extern unsigned long s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT]; |
15 | extern unsigned long s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT]; |
16 | extern unsigned long s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT]; |
17 | extern unsigned long s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT]; |
18 | |
19 | void z80_map_set(unsigned long *map, int start_addr, int end_addr, |
20 | void *func_or_mh, int is_func); |
21 | void cpu68k_map_set(unsigned long *map, int start_addr, int end_addr, |
22 | void *func_or_mh, int is_func); |
23 | void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub); |
24 | void m68k_map_unmap(int start_addr, int end_addr); |
25 | |
26 | // top-level handlers that cores can use |
27 | // (or alternatively build them into themselves) |
28 | // XXX: unhandled: *16 and *32 might cross the bank boundaries |
29 | typedef u32 (cpu68k_read_f)(u32 a); |
30 | typedef void (cpu68k_write_f)(u32 a, u32 d); |
31 | |
32 | #define MAKE_68K_READ8(name, map) \ |
33 | u32 name(u32 a) \ |
34 | { \ |
35 | unsigned long v; \ |
36 | a &= 0x00ffffff; \ |
37 | v = map[a >> M68K_MEM_SHIFT]; \ |
38 | if (v & 0x80000000) \ |
39 | return ((cpu68k_read_f *)(v << 1))(a); \ |
40 | else \ |
41 | return *(u8 *)((v << 1) + (a ^ 1)); \ |
42 | } |
43 | |
44 | #define MAKE_68K_READ16(name, map) \ |
45 | u32 name(u32 a) \ |
46 | { \ |
47 | unsigned long v; \ |
48 | a &= 0x00fffffe; \ |
49 | v = map[a >> M68K_MEM_SHIFT]; \ |
50 | if (v & 0x80000000) \ |
51 | return ((cpu68k_read_f *)(v << 1))(a); \ |
52 | else \ |
53 | return *(u16 *)((v << 1) + a); \ |
54 | } |
55 | |
56 | #define MAKE_68K_READ32(name, map) \ |
57 | u32 name(u32 a) \ |
58 | { \ |
59 | unsigned long v, vs; \ |
60 | u32 d; \ |
61 | a &= 0x00fffffe; \ |
62 | v = map[a >> M68K_MEM_SHIFT]; \ |
63 | vs = v << 1; \ |
64 | if (v & 0x80000000) { \ |
65 | d = ((cpu68k_read_f *)vs)(a) << 16; \ |
66 | d |= ((cpu68k_read_f *)vs)(a + 2); \ |
67 | } \ |
68 | else { \ |
69 | u16 *m = (u16 *)(vs + a); \ |
70 | d = (m[0] << 16) | m[1]; \ |
71 | } \ |
72 | return d; \ |
73 | } |
74 | |
75 | #define MAKE_68K_WRITE8(name, map) \ |
76 | void name(u32 a, u8 d) \ |
77 | { \ |
78 | unsigned long v; \ |
79 | a &= 0x00ffffff; \ |
80 | v = map[a >> M68K_MEM_SHIFT]; \ |
81 | if (v & 0x80000000) \ |
82 | ((cpu68k_write_f *)(v << 1))(a, d); \ |
83 | else \ |
84 | *(u8 *)((v << 1) + (a ^ 1)) = d; \ |
85 | } |
86 | |
87 | #define MAKE_68K_WRITE16(name, map) \ |
88 | void name(u32 a, u16 d) \ |
89 | { \ |
90 | unsigned long v; \ |
91 | a &= 0x00fffffe; \ |
92 | v = map[a >> M68K_MEM_SHIFT]; \ |
93 | if (v & 0x80000000) \ |
94 | ((cpu68k_write_f *)(v << 1))(a, d); \ |
95 | else \ |
96 | *(u16 *)((v << 1) + a) = d; \ |
97 | } |
98 | |
99 | #define MAKE_68K_WRITE32(name, map) \ |
100 | void name(u32 a, u32 d) \ |
101 | { \ |
102 | unsigned long v, vs; \ |
103 | a &= 0x00fffffe; \ |
104 | v = map[a >> M68K_MEM_SHIFT]; \ |
105 | vs = v << 1; \ |
106 | if (v & 0x80000000) { \ |
107 | ((cpu68k_write_f *)vs)(a, d >> 16); \ |
108 | ((cpu68k_write_f *)vs)(a + 2, d); \ |
109 | } \ |
110 | else { \ |
111 | u16 *m = (u16 *)(vs + a); \ |
112 | m[0] = d >> 16; \ |
113 | m[1] = d; \ |
114 | } \ |
115 | } |
116 | |